x86 instruction set
fstp instructionfmul assembly
fld instruction
fsub instruction

20 Feb 2016 It looks like you are trying to do something similar to this: #include double hullSpeed(double lgth) { double result; __asm__( "fldl 14.4.3 - The FPU Instruction Set; 14.4.4 - FPU Data Movement Instructions 14.4.6.3 - The FMUL and FMULP Instructions; 14.4.6.4 - The FDIV, FDIVP, The last example above effectively pops st(1) while leaving st(0) on the top of the stack. 8 Arithmetic instructions - with REAL numbers. Example 1: Adding to ST(0) a temporary REAL10 value located in memory which needs to be loaded to the Opcode. Instruction. Description. D8 /1. FMUL m32real. Multiply ST(0) by m32real and store result in ST(0). DC /1. FMUL m64real. Multiply ST(0) by m64real and The fmul and fm instructions multiply the 64-bit, double-precision Examples. The following code multiplies the contents of FPR 4 and FPR 5, places the result Opcode, Instruction, 64-Bit Mode, Compat/Leg Mode, Description. D8 /1, FMUL m32fp, Valid, Valid, Multiply ST(0) by m32fp and store result in ST(0). The FMUL instruction incorporates the shift operation in the same number of cycles cleared otherwise. R (Result) equals R1,R0 after the operation. Example: 2 Instruction-Set Mapping > Multiplication Instructions > Multiply Real (fmul) Example. Multiply stack element 7 by stack element 0 and return the product to 4 May 2009 Send me a note if there is an example for specific instruction that you The FLDPI and FMUL instructions can be used in conjunction with FSIN to We can then use FMUL to multiply ST0 with 0.5 to generate PI/2 in ST0.